Experiment on methane displacement in coalbed by supercritical carbon dioxide

WU Di; LIU Xueying; SUN Keming; XIN Liwei; MIAO Feng

doi:10.3969/j.issn.1001-1986.2019.03.014

Volume 47 Issue 3

Jun. 2019

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COAL GEOLOGY & EXPLORATION > 2019 > 47(3): 85-90. > DOI: 10.3969/j.issn.1001-1986.2019.03.014

WU Di, LIU Xueying, SUN Keming, XIN Liwei, MIAO Feng. Experiment on methane displacement in coalbed by supercritical carbon dioxide[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(3): 85-90. DOI: 10.3969/j.issn.1001-1986.2019.03.014

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Experiment on methane displacement in coalbed by supercritical carbon dioxide

School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, China

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National Natural Science Foundation for Young Scientists of China(51504122)

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Received Date: July 11, 2018
Published Date: June 24, 2019

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Abstract

Abstract

Using self-made experimental system, experiments were performed on coal samples to study supercritical CO₂ seepage, adsorption and CH₄ displacement by supercritical CO₂. Experimental results show that permeability and adsorption of supercritical CO₂ in coal increase with CO₂ pressures. Pressures and temperatures of CO₂ influence the values of displaced CH₄. Values of displaced CH₄ increase by average 0.076 cm³/g and sweep efficiency rises by 17%-23% with the CO₂ pressure increasing from 8 MPa to 12 MPa, while displacement volume decreases linearly. With the temperature rising by 10℃, sweep efficiency increases by 8% while displacement volume declines by 0.5 on average.
- methane displaced by supercritical carbon dioxide,
- temperature,
- pressure of CO₂,
- sweep efficiency,
- dis-placement volume

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